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Title: These Weeks in Rust 22
Date: 2013-11-09 05:21
Category: This Week in Rust
Welcome to a mega-*This Week in Rust*. I was swamped this past week with
schoolwork, so TWiR was put off. This week's combines the past two weeks of
progress. These past two weeks were fairly exciting in terms of language and
library progress. The next few weeks should be even more exciting.
<!-- more -->
# What's cooking on master?
There were 108 PRs merged these past two weeks.
## Breaking Changes
- The very long-awaited [enum discriminant size
patch](https://github.com/mozilla/rust/pull/9613) has landed. This will
affect FFI. Size of enum discriminant is now configurable via the `repr`
attribute, and will by default shrink to the smallest needed.
- The extension traits for `Reader` and `Writer` have [been transformed into
default methods on their respective
trait](https://github.com/mozilla/rust/pull/10079).
- Non-string literals are now
[disallowed](https://github.com/mozilla/rust/pull/10166) in attributes.
- Type parameters are now
[forbidden](https://github.com/mozilla/rust/pull/10189) on inner statics
(statics inside functions).
- The interface to flush stdout [has
changed](https://github.com/mozilla/rust/pull/10218). It was previously
unsound by allowing aliased `&mut`.
- `Result`'s API has changed [quite a
bit](https://github.com/mozilla/rust/pull/10119), to be more consistent with
`Option`, and hopefully simpler.
- Linker arguments [no longer](https://github.com/mozilla/rust/pull/10199)
propagate across crates. This means that if you link to a crate, its linker
arguments won't be automatically added when your crate is linked.
- The memory intrinsics [have been
simplified](https://github.com/mozilla/rust/pull/10251). A single intrinsic
for `memcpy`/`memmove`/`memset` is now exposed, rather than one per
platform.
- `#[link(name = "...")]` is now [taken into
account](https://github.com/mozilla/rust/pull/10260) by rustc when creating
build artifacts.
- `std::rt::io::file` [has been fleshed out and
tweaked](https://github.com/mozilla/rust/pull/10179). In particular, it has
been renamed to `std::rt::io::fs`, many previously-free functions are now
associated functions on `std::rt::io::File`, and `FileInfo` has been renamed
to `FileStat`.
## Other Changes
- Calling variadic functions with the C FFI [is now
implemented](https://github.com/mozilla/rust/pull/10064). This is a pretty
sweet change. The only thing missing in our C FFI now is unions.
- We [now have](https://github.com/mozilla/rust/pull/10243) octal numeric
literals, for all your esoteric numeric needs!
- An `Any` type [has been added](https://github.com/mozilla/rust/pull/9967),
and it is now possible to retrieve the object a task failed with. Previously
tasks could only fail with a string, now they can fail with anything.
- A `concat!` syntax extension [has been
added](https://github.com/mozilla/rust/pull/9740) for compile-time string
concatenation.
- Timers are [now also ports](https://github.com/mozilla/rust/pull/10083), and
the creator of a timer can cancel it.
- As the first part of closure reform, `proc` is [now sugar](https://github.com/mozilla/rust/pull/10132) for `~once
fn`, and `|A| -> B` (and `fn(A) -> B` for bare functions) [are now
allowed](https://github.com/mozilla/rust/pull/10187) in types.
- The section in the tutorial on vectors and strings [has been
rewritten](https://github.com/mozilla/rust/pull/10354) for correctness with
modern Rust.
- A bunch of C++ has been removed and rewritten. [Thread
creation](https://github.com/mozilla/rust/pull/10290), [memory
regions](https://github.com/mozilla/rust/pull/10094) (used for debugging and
`@`-boxes, from what I can tell), and an [unused
`array_list`](https://github.com/mozilla/rust/pull/10163/files).
- Bounds check failures are [now marked as a cold
path](https://github.com/mozilla/rust/pull/10113), and a `cold` [function
attribute](https://github.com/mozilla/rust/pull/10127) has been added.
- The build system [can cross-compile to iOS
now](https://github.com/mozilla/rust/pull/10203), even though Rust doesn't
actually run on that platform (yet!).
- `std::rand` [now implements the Gamma
distribution](https://github.com/mozilla/rust/pull/10223).
- Cross-crate destructor inlining [now
works](https://github.com/mozilla/rust/pull/10242).
- A `type_id` intrinsic [has been
added](https://github.com/mozilla/rust/pull/10182).
- Everything in the runtime that uses `libuv` has been [split into its own
crate](https://github.com/mozilla/rust/pull/10058). This means that the
runtime really is pluggable: you can implement your own event loop and so
forth.
## New Contributors
Welcome to our new contributors!
- Brian
- Carol Willing
- Dirkjan Bussink
- Guillaume Pinot
- Gyorgy Andrasek
- Joshua Yanovski
- Mat Carberry
- Noufal Ibrahim
- Robert Irelan
- Tomas Sedovic
- Jennifer Ward
- Patrick Kim
At .85 new contributors a day, we'll soon dwarf every other language in the
"awesome volunteer" category.
# Weekly Meetings
Last week's
[meeting](https://github.com/mozilla/rust/wiki/Meeting-weekly-2013-10-29)
discussed segmented stacks (spoiler: [they're not coming
back](https://mail.mozilla.org/pipermail/rust-dev/2013-November/006314.html) )
and placement new (we want it, how do we want it?).
This week's
[meeting](https://github.com/mozilla/rust/wiki/Meeting-weekly-2013-11-05)
discussed the future of libextra, more stack things, octal literals, vector
representation, and temporary ("rvalue") lifetimes.
# Announcements etc
- **Reminder from ~~the Ministry of Truth~~ ChrisMorgan**: Rust is awesome.
- Rust Skåne, [has an event page
now](http://www.foocafe.org/event/a-friendly-introduction-to-rust). It will
be December 3 at 17:30 in Foo Cafe.
- [Integermingled Parameter
Lists](http://smallcultfollowing.com/babysteps/blog/2013/10/29/intermingled-parameter-lists/),
and [take
2](http://smallcultfollowing.com/babysteps/blog/2013/11/04/intermingled-parameter-lists/).
- [speculate](https://github.com/haxney/speculate) - a parallel speculative
execution library.
- [mcchat](https://github.com/luqmana/mcchat) - a pure-Rust Minecraft chat
client.
|
